\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Casualty Results (Two Region Strategy: Khyber)\label{tab:cas2khy}}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Casualties}&\multicolumn{1}{c}{Casualties}&\multicolumn{1}{c}{Casualties}&\multicolumn{1}{c}{Casualties}\\
\hline
treat\(\cdot\)nwa   &      -6.498\sym{*}&      -7.606\sym{*}&      -8.833\sym{*}&      -7.533\sym{*}\\
                    &     (2.228)       &     (3.149)       &     (3.767)       &     (3.347)       \\
[1em]
MO                  &                   &                   &       6.775\sym{*}&                   \\
                    &                   &                   &     (3.079)       &                   \\
[1em]
Peace               &                   &                   &      -2.354       &                   \\
                    &                   &                   &     (3.591)       &                   \\
[1em]
Obamareview         &                   &                   &       4.737       &       1.842       \\
                    &                   &                   &     (2.980)       &     (4.454)       \\
[1em]
Haqqani             &                   &                   &      -2.209       &      -1.311       \\
                    &                   &                   &     (2.379)       &     (2.380)       \\
\hline
Observations        &        1391       &        1391       &        1391       &        1391       \\
WB p-value          &     0.00400       &      0.0540       &      0.0420       &      0.0240       \\
Year FE             &           X       &           X       &           X       &           X       \\
Tehsil FE           &           X       &           X       &           X       &           X       \\
Time Trends         &                   &           X       &           X       &           X       \\
Controls            &                   &                   &           X       &           X       \\
Hetero. Ctrls       &                   &                   &                   &           X       \\
\hline\hline
\multicolumn{5}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.05\)}\\
\end{tabular}
\end{table}
